Mission Occupational Specialties Explained
In the Marine Corps, each and every individual that claims the title is a rifleman first.
100’s: Personnel and Administration
- 0111 Administrative Specialist
- 0147 Equal Opportunity Advisor (EOA)
- 0149 Substance Abuse Control Specialist
- 0161 Postal Clerk
- 0171 Manpower Information Systems (MIS) Analyst
200’s: Intelligence
- 0211 Counterintelligence/Human Intelligence (CI/HUMINT) Specialist
- 0212 Technical Surveillance Countermeasures (TSCM) Specialist
- 0231 Intelligence Specialist
- 0241 Imagery Analysis Specialist
- 0261 Geographic Intelligence Specialist
- 0291 Intelligence Chief
300’s: Infantry
- 0311 Rifleman
- 0312 Riverine Assault Craft (RAC) Marine
- 0313 Light Armor Vehicle Marine
- 0314 Rigid Raiding Craft (RRC)/Rigid Hull Inflatable Boat (RHIB) Coxswain
- 0316 Combat Rubber Reconnaissance Craft (CRRC) Coxswain
- 0317 Scout Sniper
- 0321 Reconnaissance Marine
- 0323 Reconnaissance Marine, Parachute Qualified
- 0324 Reconnaissance Marine, Combatant Diver Qualified
- 0326 Reconnaissance Marine, Parachute and Combatant Diver Qualified
- 0331 Machine Gunner
- 0341 Mortarman
- 0351 Infantry Assault Marine
- 0352 Antitank Missile Gunner
- 0365 Infantry Squad Leader
- 0369 Infantry Unit Leader
- 0372 Critical Skills Operator (CSO)
400’s: Logistics
- 0411 Maintenance Management Specialist
- 0431 Logistics/Embarkation Specialist
- 0451 Airborne and Air Delivery Specialist
- 0471 Personnel Retrieval and Processing Specialist
- 0472 Personnel Retrieval and Processing Technician
- 0477 Expeditionary Logistics Instructor (ELI)
- 0481 Landing Support Specialist
- 0491 Logistics/Mobility Chief
500’s: MAGTF (Planning)
- 511 MAGTF Planning Specialist
- 0521 Military Information Support Operations (MISO) Noncommissioned Officer
- 0531 Civil Affairs Noncommissioned Officer
- 0551 Information Operations Specialist
- 0571 Foreign Security Forces Advisor
600’s: Communications
- 0612 Tactical Switching Operator
- 0613 Construction Wireman
- 0619 Telecommunications Systems Chief
- 0621 Field Radio Operator
- 0622 Digital Multi-channel Wideband Transmission Equipment Operator
- 0623 Tropospheric Scatter Radio Multi-channel Equipment Operator
- 0627 Satellite Communications Operator
- 0629 Radio Chief
- 0648 Spectrum Manager
- 0651 Data Network Specialist (Garrison)
- 0652 Certification Authority Workstation (CAW) Operator
- 0653 Defense Message System (DMS) Specialist
- 0656 Tactical Data Network Specialist (Field)
- 0659 Cyber Network Systems Chief
- 0681 Information Security Technician
- 0689 Cyber Security Technician
- 0699 Communications Chief
800’s: Field Artillery
- 0811 Field Artillery Cannoneer
- 0814 High Mobility Artillery Rocket System (HIMARS) Operator
- 0842 Field Artillery Radar Operator
- 0844 Field Artillery FDC (Fire Direction Control) Marine
- 0847 Field Artillery Sensor Support Marine
- 0848 Field Artillery FDC Operations Chief
- 0861 Field Artillery Scout Observer Marine
900’s: Training
- 0911 Marine Corps Drill Instructor
- 0913 Marine Combat Instructor
- 0916 Martial Arts Instructor
- 0917 Martial Arts Instructor-Trainer
- 0919 Force Fitness Instructor
- 0918 Water Safety/Survival Instructor
- 0931 Marksmanship Instructor
- 0932 Small Arms Weapons Instructor
- 0933 Marksmanship Coach
1100’s: Utilities
- 1141 Electrician
- 1142 Electrical Equipment Repair Specialist
- 1161 Refrigeration Mechanic
- 1169 Utilities Chief
- 1171 Water Support Technician
1300’s: Engineering, Construction, Facilities, and Equipment
- 1316 Metal Worker
- 1333 Operator while impaired
- 1341 Engineer Equipment Mechanic
- 1342 Small Craft Mechanic
- 1343 Assault Breacher Vehicle Mechanic
- 1345 Engineer Equipment Operator
- 1349 Engineer Equipment Chief
- 1361 Engineer Assistant
- 1371 Combat Engineer
- 1372 Assault Breacher Vehicle Operator
- 1391 Bulk Fuel Specialist
1800’s: Tank and Assault Amphibious Vehicles
- 1812 Armor Marine
- 1833 Assault Amphibious Vehicle (AAV) Marine
- 1834 ACV Marine
2100’s: Ground and Ordnance Maintenance
- 2111 Small Arms Repairer/Technician
- 2112 Precision Weapons Repairer
- 2131 Towed Artillery Systems Technician
- 2141 Assault Amphibious Vehicle (AAV) Repairer/Technician
- 2146 Main battle tank (MBT) Repairer/Technician
- 2147 Light Armored Vehicle (LAV) Repairer/Technician
- 2148 Expeditionary Fighting Vehicle (EFV) Repairer/Technician
- 2149 Ordnance Vehicle Maintenance Chief
- 2161 Machinist
- 2171 Electro-Optical Ordnance Repairer/Technician
- 2181 Senior Ground Ordnance Weapons Chief
2300’s: Ammunition and Explosive Ordnance Disposal
- 2311 Ammunition Technician
- 2336 Explosive Ordnance Disposal (EOD) Technician
2600’s: Signals Intelligence/Ground Electronic Warfare
- 2611 Cryptologic Digital Network Operator/Analyst
- 2621 Special Communications Signals Collection Operator/Analyst
- 2629 Signals Intelligence Analyst
- 2631 Electronic Intelligence (ELINT) Intercept Operator/Analyst
- 2649 Cryptanalyst
- 2651 Special Intelligence System Administrator/Communicator
- 2671 Middle East Cryptologic Linguist
- 2673 Asia-Pacific Cryptologic Linguist
- 2674 European I (West) Cryptologic Linguist
- 2676 European II (East) Cryptologic Linguist
- 2691 Signals Intelligence/Electronic Warfare (SIGINT/EW) Chief
2700’s: Linguist
Middle East
- 2711 Pakistani Pashtu
- 2712 Arabic (Modern Standard)
- 2713 Arabic (Egyptian)
- 2714 Arabic (Syrian)
- 2716 Amharic
- 2717 Bengali
- 2718 Hebrew
- 2719 Hindi
- 2721 Kurdish
- 2722 Persian
- 2723 Somali
- 2724 Swahili
- 2726 Turkish
- 2727 Urdu
Asia-Pacific
- 2733 Burmese
- 2734 Cambodian
- 2736 Cantonese
- 2737 Chinese (Mandarin)
- 2738 Indonesian
- 2741 Korean
- 2746 Thai
- 2747 Vietnamese
European I (West)
- 2754 Dutch
- 2756 Finnish
- 2757 French
- 2758 German
- 2759 Greek
- 2761 Haitian-Creole
- 2762 Icelandic
- 2763 Italian
- 2764 Norwegian
- 2766 Portuguese (BR)
- 2767 Portuguese (EU)
- 2768 Spanish
- 2769 Swedish
European II (East)
- 2776 Albanian
- 2777 Armenian
- 2778 Bulgarian
- 2779 Czech
- 2781 Estonian
- 2782 Georgian
- 2783 Hungarian
- 2784 Latvian
- 2786 Lithuanian
- 2787 Macedonian
- 2788 Polish
- 2789 Romanian
- 2791 Russian
- 2792 Serb-Croat
- 2793 Slovenian
- 2794 Ukrainian
2800’s: Data/Communications Maintenance
- 2818 Teletype Repair
- 2819 Teletype/Cryptologic Maintenance and Repair
- 2821 Technical Controller Marine
- 2822 Electronic Switching Equipment Technician
- 2823 Technical Control Chief
- 2826 AN/MSC-63A Maintenance Technician
- 2827 Tactical Electronic Reconnaissance Process/Evaluation System (TERPES) Technician
- 2831 Multichannel Equipment Repairer
- 2832 Multichannel Equipment Technician (No longer assigned)
- 2833 Fleet Satellite Terminal Technician
- 2834 Satellite Communications (SATCOM) Technician
- 2841 Ground Radio Repairman
- 2844 Ground Communications Organizational Repairer
- 2846 Ground Radio Intermediate Repairer
- 2847 Telephone Systems/Personal Computer Intermediate Repairer
- 2848 Tactical Remote Sensor System (TRSS) Maintainer
- 2862 Electronics Maintenance Technician
- 2871 Test Measurement and Diagnostic Equipment Technician
- 2874 Metrology Technician
- 2881 2M/ATE Technician
- 2887 Artillery Electronics Technician
- 2891 Electronics Maintenance
3000’s: Supply Administration and Operations
- 3043 Supply Administration and Operations Clerk
- 3044 Contract Specialist
- 3051 Warehouse Clerk
- 3052 Packaging Specialist
- 3072 Aviation Supply Clerk
3100’s: Distribution Management
- 3112 Distribution Management Specialist
3300’s: Food Service
- 3381 Food Service Specialist
- 3372 Marine Aide-enlisted aide to General and Flag officers
3400’s: Financial Management
- 3432 Finance Technician – MGySgt–Pvt
- 3441 Non-appropriated fund (NAF) Audit Technician – MGySgt–Sgt
- 3451 Fiscal/Budget Technician – MGySgt–Pvt
3500’s: Motor Transport
- 3521 Automotive Organizational Technician
- 3522 Automotive Intermediate Mechanic
- 3523 Vehicle Recovery Mechanic
- 3524 Fuel and Electrical Systems Mechanic
- 3526 Crash/Fire/Rescue Vehicle Mechanic
- 3529 Motor Transport Maintenance Chief
- 3531 Motor Vehicle Operator
- 3533 Logistics Vehicle System Operator
- 3534 Semitrailer Re fueler Operator
- 3536 Vehicle Recovery Operator
- 3537 Motor Transport Operations Chief
- 3538 Licensing Examiner
4100’s: Morale, Welfare, and Recreation
- 4133 Morale, Welfare, Recreation (MWR) Specialist
4300’s: Public Affairs
- 4212 Basic Military Journalism
- 4313 Broadcast Journalist
- 4341 Combat Correspondent
4400’s: Legal Services
- 4421 Legal Services Specialist
- 4422 Legal Services Reporter (Voice Recognition)
4600’s: Combat Camera
- 4612 Production Specialist
- 4616 Reproduction Equipment Repairman
- 4641 Combat Photographer
- 4671 Combat Videographer
- 4691 Combat Camera Chief
4800’s: Recruiting and Retention Specialist
- 4821 Career Retention Specialist (PMOS)
5500’s: Music
- 5511 Member, The President’s Own, United States Marine Band (PMOS)
- 5512 Member, The Commandant’s Own, United States Marine Drum and Bugle Corps (PMOS)
- 5519 Enlisted Conductor
- 5521 Drum Major
- 5522 Small Ensemble Leader
- 5523 Instrument Repair Technician
- 5524 Musician
- 55XX skill designators for 5524:
- 5526 Oboe
- 5528 Bassoon
- 5534 Clarinet
- 5536 Flute/Piccolo
- 5537 Saxophone
- 5541 Trumpet
- 5543 Euphonium
- 5544 Horn
- 5546 Trombone
- 5547 Tuba/Sousaphone
- 5548 Electric Bass
- 5563 Percussion (Drums, Timpani, and Mallets)
- 5565 Piano
- 5566 Guitar
- 5567 Arranger, Band
The following apply only to the Drum and Bugle Corps:
- 5571 Drum and Bugle Corps Drum Major
- 5574 Soprano or Mellophone Bugle
- 5576 French horn Bugle
- 5577 Bass Baritone Bugle
- 5579 Contrabass Bugle
- 5592 Drum and Bugle Corps Arranger
- 5593 Percussion
5700’s: Chemical, Biological, Radiological, and Nuclear Defense (CBRN)
- 5711 Chemical, Biological, Radiological, and Nuclear (CBRN) Defense Specialist
5800’s: Military Police and Corrections
- 5811 Military Police
- 5812 Working Dog Handler
- 5813 Accident Investigator
- 5814 Physical Security Specialist
- 5816 Special Reaction Team (SRT) Member
- 5819 Military Police Investigator
- 5821 Criminal Investigator CID Agent
- 5822 Forensic Psycho-physiologist (Polygraph Examiner)
- 5831 Correctional Specialist
- 5832 Correctional Counselor
5900’s: Electronics Maintenance
- 5912 Avenger System Maintainer
- 5939 Aviation Communication Systems Technician
- 5942 Aviation Radar Technician
- 5948 Aviation Radar Repairer
- 5951 Aviation Meteorological Equipment Technician, OMA/IMA
- 5952 Air Traffic Control Navigational Aids Technician
- 5953 Air Traffic Control Radar Technician
- 5954 Air Traffic Control Communications Technician
- 5959 Air Traffic Control Systems Maintenance Chief
- 5962 Tactical Data Systems Equipment (TDSE) Repairer
- 5963 Tactical Air Operations Module Repairer (obs)
- 5974 Tactical Data Systems Administrator (TDSA)
- 5979 Tactical Air Operations Module/Air Defense Technician
- 5993 Electronics Maintenance Chief
60/61/6200’s: Aircraft Maintenance
- 3215 Basic Aircraft Maintenance Marine
- 6012 Aviation Maintenance Controller/Production Controller
- 6018 Aviation Quality Assurance Representative (QAR) Inspector
- 6019 Aircraft Maintenance Chief
- 6023 Aircraft Power Plants Test Cell Operator
- 6033 Aircraft Nondestructive Inspection Technician
- 6042 Individual Material Readiness List (IMRL) Asset Manager
- 6043 Aircraft Welder
- 6046 Aircraft Maintenance Administration Specialist
- 6048 Flight Equipment Technician
- 6049 NALCOMIS Application Administrator/Analyst
- 6061 Aircraft Intermediate Level Hydraulic/Pneumatic Mechanic-Trainee
- 6062 Aircraft Intermediate Level Hydraulic/Pneumatic Mechanic
- 6071 Aircraft Maintenance Support Equipment (SE) Mechanic-Trainee
- 6072 Aircraft Maintenance Support Equipment (SE) Hydraulic/Pneumatic/Structures Mechanic
- 6073 Aircraft Maintenance Support Equipment (SE) Electrician/Refrigeration Mechanic
- 6074 Cryogenics Equipment Operator
- 6091 Aircraft Intermediate Level Structures Mechanic-Trainee
- 6092 Aircraft Intermediate Level Structures Mechanic
- 6100 Helicopter/Tiltrotor Mechanic-Trainee
- 6112 Helicopter Mechanic, CH-46
- 6113 Helicopter Mechanic, CH-53
- 6114 Helicopter Mechanic, UH/AH-1
- 6116 Tiltrotor Mechanic, MV-22
- 6122 Helicopter Power Plants Mechanic, T-58
- 6123 Helicopter Power Plants Mechanic, T-64
- 6124 Helicopter Power Plants Mechanic, T-400/T-700
- 6132 Helicopter/Tiltrotor Dynamic Components Mechanic
- 6151 Helicopter/Tiltrotor Airframe Mechanic-Trainee
- 6152 Helicopter Airframe Mechanic, CH-46
- 6153 Helicopter Airframe Mechanic, CH-53
- 6154 Helicopter Airframe Mechanic, UH/AH-1
- 6156 Tiltrotor Airframe Mechanic, MV-22
- 6162 Presidential Support Specialist
- 6172 Helicopter Crew Chief, CH-46
- 6173 Helicopter Crew Chief, CH-53
- 6174 Helicopter Crew Chief, UH-1N/Y
- 6176 Tilt-rotor Crew Chief, MV-22
- 6177 Weapons and Tactics Crew Chief Instructor
- 6178 VH-60N Presidential Helicopter Crew Chief
- 6179 VH-3D Presidential Helicopter Crew Chief
- 6199 Enlisted Aircrew/Aerial Observer/Gunner
- 6211 Fixed-wing Aircraft Mechanic-Trainee
- 6212 Fixed-Wing Aircraft Mechanic, AV-8/TAV-8
- 6213 Fixed-Wing Aircraft Mechanic, EA-6
- 6214 Unmanned Aerial Vehicle (UAV) Mechanic
- 6216 Fixed-Wing Aircraft Mechanic, KC-130
- 6217 Fixed-Wing Aircraft Mechanic, F/A-18
- 6222 Fixed-Wing Aircraft Power Plants Mechanic, F-402
- 6223 Fixed-Wing Aircraft Power Plants Mechanic, J-52
- 6226 Fixed-Wing Aircraft Power Plants Mechanic, T-56
- 6227 Fixed-wing Aircraft Power Plants Mechanic, F-404
- 6242 Fixed-Wing Aircraft Flight Engineer, KC-130
- 6243 Fixed-Wing Transport Aircraft Specialist, C-9
- 6244 Fixed-Wing Transport Aircraft Specialist, C-12
- 6246 Fixed-Wing Transport Aircraft Specialist, C-20
- 6247 Fixed-Wing Transport Aircraft Specialist, UC-35
- 6251 Fixed-Wing Aircraft Airframe Mechanic-Trainee
- 6252 Fixed-Wing Aircraft Airframe Mechanic, AV-8/TAV-8
- 6253 Fixed-Wing Aircraft Airframe Mechanic, EA-6
- 6256 Fixed-Wing Aircraft Airframe Mechanic, KC-130
- 6257 Fixed-Wing Aircraft Airframe Mechanic, F/A-18
- 6258 Fixed-Wing Aircraft Airframe Mechanic, F-35B
- 6276 Fixed-Wing Aircraft Crew Chief, KC-130
- 6281 Fixed-Wing Aircraft Safety Equipment Mechanic- Trainee
- 6282 Fixed-Wing Aircraft Safety Equipment Mechanic, AV-8/TAV-8
- 6283 Fixed-Wing Aircraft Safety Equipment Mechanic, EA-6
- 6286 Fixed-Wing Aircraft Safety Equipment Mechanic, KC-130
- 6287 Fixed-Wing Aircraft Safety Equipment Mechanic, F/A-18
63/6400’s: Avionics
- 6311 Aircraft Communications/Navigation/Electrical/Weapon Systems Technician-Trainee, OMA
- 6312 Aircraft Communications/Navigation/Weapon Systems Technician, AV-8
- 6313 Aircraft Communications/Navigation/Radar Systems Technician, EA-6
- 6314 Unmanned Aerial Vehicle (UAV) Avionics Technician
- 6316 Aircraft Communications/Navigation Systems Technician, KC-130
- 6317 Aircraft Communications/Navigation Systems Technician, F/A-18
- 6322 Aircraft Communications/Navigation/Electrical Systems Technician, CH-46
- 6323 Aircraft Communications/Navigation/Electrical Systems Technician, CH-53
- 6324 Aircraft Communications/Navigation/Electrical/Weapon Systems Technician, U/AH-1
- 6326 Aircraft Communications/Navigation/Electrical/Weapon Systems Technician, V-22
- 6331 Aircraft Electrical Systems Technician-Trainee
- 6332 Aircraft Electrical Systems Technician, AV-8
- 6333 Aircraft Electrical Systems Technician, EA-6
- 6336 Aircraft Electrical Systems Technician, KC-130
- 6337 Aircraft Electrical Systems Technician, F/A-18
- 6338 Aircraft Avionics Technician, F-35
- 6344 Aircraft Electric Systems Technician, UH-1N/AH-1T
- 6386 Aircraft Electronic Countermeasures Systems Technician, EA-6B
- 6391 Avionics Maintenance Chief
- 6411 Aircraft Communications/Navigation Systems Technician- Trainee, IMA
- 6412 Aircraft Communications Systems Technician, IMA
- 6413 Aircraft Navigation Systems Technician, IFF/RADAR/TACAN, IMA
- 6414 Advanced Aircraft Communications/Navigation Systems Technician, IMA
- 6422 Aircraft Cryptographic Systems Technician, IMA
- 6423 Aviation Electronic Microminiature/Instrument and Cable Repair Technician, IMA
- 6431 Aircraft Electrical Systems Technician-Trainee
- 6432 Aircraft Electrical/Instrument/Flight Control Systems Technician, Fixed Wing, IMA
- 6433 Aircraft Electrical/Instrument/flight Control Systems Technician, Helicopter, IMA
- 6434 Advanced Aircraft Electrical/Instrument/Flight Control Systems Technician, IMA
- 6461 Hybrid Test Set Technician, IMA
- 6462 Avionics Test Set (ATS) Technician, IMA
- 6463 Radar Test Station (RTS)/Radar Systems Test Station (RSTS) Technician, IMA
- 6464 Aircraft Inertial Navigation System Technician, IMA
- 6466 Aircraft Forward Looking Infrared/Electro-Optical Technician, IMA
- 6467 Consolidated Automatic Support System (CASS) Technician, IMA
- 6468 Aircraft Electrical Equipment Test Set (EETS)/Mobile Electronic Test Set (METS) Technician
- 6469 Advanced Automatic Test Equipment Technician, IMA
- 6482 Aircraft Electronic Countermeasures Systems Technician, Fixed Wing, IMA
- 6483 Aircraft Electronic Countermeasures Systems Technician, Helicopter, IMA
- 6484 Aircraft Electronic Countermeasures Systems/RADCOM/CAT IIID Technician, IMA
- 6486 Advanced Aircraft Electronic Countermeasures Technician, IMA
- 6491 Aviation Precision Measurement Equipment (PME) Chief
- 6492 Aviation Precision Measurement Equipment/Calibration and Repair Technician, IMA
- 6499 Mobile Facilities Technician
6500’s: Aviation Ordinance
- 6511 Aviation Ordnance Trainee
- 6531 Aviation Ordnance Technician
- 6541 Aviation Ordnance Systems Technician
- 6591 Aviation Ordnance Chief
6600’s: Aviation Logistics
- 6613 Radio Communication and Navigation Systems Technician on Utility Aircraft
- 6617 Enlisted Aviation Logistician
- 6672 Aviation Supply Specialist
- 6694 Aviation Logistics Information Management and Support Specialists
6800’s: Meteorological and Oceanographic (METOC)
- 6842 METOC Analyst Forecaster
- 6852 METOC Impact Analyst
7000’s: Airfield Services
- 7011 Expeditionary Airfield Systems Technician
- 7041 Aviation Operations Specialist
- 7051 Aircraft Rescue and Firefighting Specialist
7200’s: Air Control/Air Support/Anti-air Warfare/Air Traffic Control
- 7212 Low Altitude Air Defense Gunner
- 7222 Hawk Missile Operator
- 7234 Air Control Electronics Operator
- 7236 Tactical Air Defense Controller
- 7242 Air Support Operations Operator
- 7251 Air Traffic Controller – Trainee
- 7252 Air Traffic Controller – Tower
- 7253 Air Traffic Controller – Radar Arrival/Departure Controller
- 7254 Air Traffic Controller – Radar Approach Controller
- 7257 Air Traffic Controller
- 7291 Senior Air Traffic Controller
7300’s: Navigation Officer/Enlisted Flight Crews
- 7313 Helicopter Specialist, AH-1Z/UH-1Y
- 7314 Unmanned Aerial Vehicle (UAV) Internal Operator
- 7371 Tactical Systems Operator Trainee
- 7372 Tactical Systems Operator/Mission Specialist
- 7382 Airborne Radio Operator/In-flight Refueling Observer/Loadmaster